1. AIR TEMPERATURE TRENDS IN CLUJ-NAPOCA (1978-2007). Authors: DUMITRU RISTOIU, CONSTANTIN COSMA, SANDU-VALER TAHÂȘ.2. THE RELATIONSHIP BETWEEN SOLAR ACTIVITY AND THE ANNUAL PRECIPITATION IN THE CLUJ-NAPOCA AREA, ROMANIA. Authors: SANDU-VALER TAHÂȘ, DUMITRU RISTOIU.3. TRENDS OF THE GLOBAL SOLAR RADIATION AND PRECIPITATION IN CLUJ-NAPOCA, ROMANIA. Authors: DUMITRU RISTOIU, SANDU-VALER TAHÂȘ.